EP 0416703 A2 19910313 - Rapid-response differential amplifier with rail-to-rail input capability.
Title (en)
Rapid-response differential amplifier with rail-to-rail input capability.
Title (de)
Schnellansprechender Differenzverstärker mit einer Eingangsfähigkeit über den ganzen Versorgungsspannungsbereich.
Title (fr)
Amplificateur différentiel à réponse rapide avec une plage de signaux d'entrée courant la tension d'alimentation.
Publication
Application
Priority
US 40548589 A 19890908
Abstract (en)
A differential amplifier contains first and second differential portions (20 and 22) that operate together to achieve rail-to-rail input amplification capability. A main current supply (6) provides a main supply current (IL) for the two differential portions. The circuit transconductance is controlled in a desired manner with a control amplifier (AN) suitably coupled to the differential portions and main current supply. A current-steering circuit typically formed with a pair of voltage clamps (30 and 32) enables a pair of level-shift current supplies (16 and 18) in the second differential portion to remain conductive as the input common-mode voltage traverses the entire supply voltage range. Consequently, the differential amplifier achieves a very fast response to changes in the input voltage difference irrespective of the value of the input common-mode voltage.
IPC 1-7
IPC 8 full level
H03F 3/45 (2006.01)
CPC (source: EP KR US)
H03F 3/45 (2013.01 - KR); H03F 3/45479 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
US 4977378 A 19901211; DE 69020266 D1 19950727; DE 69020266 T2 19960215; EP 0416703 A2 19910313; EP 0416703 A3 19910724; EP 0416703 B1 19950621; HK 164996 A 19960913; JP 3110743 B2 20001120; JP H03104407 A 19910501; KR 0146358 B1 19981201; KR 910007242 A 19910430
DOCDB simple family (application)
US 40548589 A 19890908; DE 69020266 T 19900905; EP 90202348 A 19900905; HK 164996 A 19960905; JP 23548190 A 19900905; KR 900014025 A 19900906